glsl-optimizer: Fixed warnings.
glsl-optimizer: Fixed warnings.

jpcy/bgfx,mendsley/bgfx,LWJGL-CI/bgfx,jdryg/bgfx,LWJGL-CI/bgfx,emoon/bgfx,attilaz/bgfx,attilaz/bgfx,septag/bgfx,fluffyfreak/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,emoon/bgfx,mendsley/bgfx,fluffyfreak/bgfx,MikePopoloski/bgfx,fluffyfreak/bgfx,jpcy/bgfx,jdryg/bgfx,septag/bgfx,LWJGL-CI/bgfx,jpcy/bgfx,septag/bgfx,jdryg/bgfx,bkaradzic/bgfx,jdryg/bgfx,bkaradzic/bgfx,MikePopoloski/bgfx,emoon/bgfx,attilaz/bgfx,MikePopoloski/bgfx,mendsley/bgfx,fluffyfreak/bgfx,bkaradzic/bgfx,jpcy/bgfx